Head to head
Tourna Irradiated 17 vs Tourna Quasi-Gut Armor 17
Quasi-Gut Armor 17 leads on 4 of 6 measurements. The widest gap is ball bite, where Quasi-Gut Armor 17 is 23 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.
Measured, side by side
Bars are percentile against all 788 strings, and the marked side is the one that measures better, which is not always the one you want. A firmer bed is worse for your elbow and better for your control, and no measurement knows which of those you came for.
Which one wins, by problem
Each string's standing on the site's rankings, out of every measured string in the database. This is where a comparison stops being arithmetic and starts being a decision.
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Irradiated 17228th
Quasi-Gut Armor 17191st
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Irradiated 17109th
Quasi-Gut Armor 1736th
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Irradiated 17601st
Quasi-Gut Armor 17678th
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Irradiated 17151st
Quasi-Gut Armor 1785th
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Irradiated 1780th
Quasi-Gut Armor 1784th
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Irradiated 17303rd
Quasi-Gut Armor 17440th
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Irradiated 17124th
Quasi-Gut Armor 1766th
Swapping between them: what tension?
Bed stiffness is published at one reference tension, so the only honest conversion is to scale it. These are starting points from 52 lb, not prescriptions. The calculator takes your own tension.
Coming from Irradiated 17 at 52 lb
String Quasi-Gut Armor 17 at 55.5 lb 25.2 kg
Coming from Quasi-Gut Armor 17 at 52 lb
String Irradiated 17 at 48.7 lb 22.1 kg
Hybrid: what if you used both?
Estimated, not measured. No hybrid combination has been tested as a bed. These figures are the two strings' own lab measurements weighted by how much of the bed each one actually is. Treat them as a guide to which way a pairing moves, never as lab data.
Irradiated 17 mains / Quasi-Gut Armor 17 crosses
Quasi-Gut Armor 17 mains / Irradiated 17 crosses
Which goes dead first?
Estimated from tension loss, which is the only thing the database measures about ageing. This is when the bed stops playing the way you strung it, not when the string breaks.
Irradiated 17
~37 hours of play
Quasi-Gut Armor 17
~37 hours of play
Both strings in full
| String | Gauge | Price | Stiff lb/in | Loss % | Power % | Spin | Bite COF | Friction COF |
|---|---|---|---|---|---|---|---|---|
| Tourna Irradiated 17 Nylon | 17 | find | 154 | 17 | 92 | 5.4 | 0.472 | 0.088 |
| Tourna Quasi-Gut Armor 17 Nylon/Polyester | 17 | find | 144 | 18 | 93 | 5.6 | 0.548 | 0.097 |
Add a third string Irradiated 17 in full Quasi-Gut Armor 17 in full